Caesar

the title assumed by the Roman emperors after Julius Caesar. In
the New Testament this title is given to various emperors as
sovereigns of Judaea without their accompanying distinctive
proper names (John 19:15; Acts 17:7). The Jews paid tribute to
Caesar (Matt. 22:17), and all Roman citizens had the right of
appeal to him (Acts 25:11). The Caesars referred to in the New
Testament are Augustus (Luke 2:1), Tiberius (3:1; 20:22),
Claudius (Acts 11:28), and Nero (Acts 25:8; Phil. 4:22).